Guest at the Kennedy Center in Washington D.C. honoring Ellen DeGeneres, receiving the 15th 'Mark Twain Price for American Humour'.
| Name | Type | Role | |
|---|---|---|---|
| Jimmy Kimmel | Guest Star | ||
| Jane Lynch | Guest Star | ||
| John Krasinski | Guest Star | ||
| Jason Mraz | Guest Star | ||
| John Leguizamo | Guest Star | ||
| Ellen DeGeneres | Guest Star | ||
| Lily Tomlin | Guest Star | ||
| Steve Harvey | Guest Star | ||
| Kristin Chenoweth | Guest Star | ||
| Sean Hayes | Guest Star |